OnPreviewFrame data image to imageView

Question

i\'m trying to get the byte[] from the preview of the camera, convert it to bitmap and display it on a imageview with imageView.setImageBitmap()

i\'ve managed to sta

Answer 1

It is possible you did not open the Camera in the UI thread. However, you need to ensure setImageBitmap is called in the UI thread:

@Override
public void onPreviewFrame(final byte[] data, Camera camera) {
    Camera.Parameters parameters = camera.getParameters();
    int width = parameters.getPreviewSize().width;
    int height = parameters.getPreviewSize().height;

    YuvImage yuv = new YuvImage(data, parameters.getPreviewFormat(), width, height, null);

    ByteArrayOutputStream out = new ByteArrayOutputStream();
    yuv.compressToJpeg(new Rect(0, 0, width, height), 50, out);

    byte[] bytes = out.toByteArray();
    final Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);

    MyActivity.this.runOnUiThread(new Runnable() {

        @Override
        public void run() {
            ((ImageView) findViewById(R.id.loopback)).setImageBitmap(bitmap);
        }
    });
}